Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC)
Abstract
We present predictions for double-quarkonium production in the kinematical region relevant for the proposed fixed-target experiment using the LHC beams (dubbed as AFTER@LHC). These include all spin-triplet S -wave charmonium and bottomonium pairs, i.e. Psi(n_1S) + Psi(n_2S), Psi(n_1S) + Upsilon(m_1S) and Upsilon(m_1S) + Upsilon(m_2S ) with n_1,n_2 = 1,2 and m_1,m_2 = 1,2,3. We calculate the contributions from double-parton scatterings and single-parton scatterings. With an integrated luminosity of 20 fb-1 to be collected at AFTER@LHC, we find that the yields for double-charmonium production are large enough for differential distribution measurements. We discuss some differential distributions for J/Psi + J/Psi production, which can help to study the physics of double-parton and single-parton scatterings in a new energy range and which might also be sensitive to double intrinsic c-bar(c) coalescence at large negative Feynman x.
Keywords
Cite
@article{arxiv.1504.06531,
title = {Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC)},
author = {Jean-Philippe Lansberg and Hua-Sheng Shao},
journal= {arXiv preprint arXiv:1504.06531},
year = {2015}
}
Comments
Latex, 24 pages, 23 figures, 12 tables. v2: published version: complete analysis of the colour-octet contributions for psi+Y production added and the impact of the NLO corrections discussed